Pierre Burkhard

Subthalamic nucleus deep brain stimulation in Parkinson disease patients over age 70 years

H. Russmann, B. Robert, Jean-Guy Villemure, 2004, Neurology.

Levodopa in the treatment of Parkinson’s disease: an old drug still going strong

Angelo Antonini, Werner Poewe, W. Poewe, 2010, Clinical interventions in aging.